I don't know where I should go now. [ I've tried kwonsk's instruction but I always got the MV_BOOTSIZE undefined error. ] I need to compile my u-boot.bin because I wanted to change the bootdelay from 3 (or 5 or whatever) to 0 seconds, besides getting the booting from SD card support --- the binary from kwonsk works great btw.

...Just FYI - I find the full sized SD card sticking out of the side of the box to be quite ugly and probably has quite a lot of potential to get dislodged.MMCmobile cards are about half length, and fit almost flush with the side, and seem to work just as well as my SDHC card. They only seem to come in sizes up to 2GB, but that ought to be adequate for an OS install.

Gothnet, I am not familiar with the MMCmobile format. Are the functionally compatible with SDCard (other than the half length) ? I have currently my ShPlug running off an external SDCard plugged into the side slot. If I use the MMCmobile, do I need a different sw driver, or it will work with my SDCard image?

I can confirm that, with the Uboot from the alpha-6 installer, I have/am successfully booted/booting my Plug from an ext2 FS on my SDcard that has 256 byte inodes (the default), so "-I 128" is not strictly necessary. I've not tried from an ext3 partition, so thanks for the heads-up.

As stated in an earlier post, I have observed several problems with this Uboot:

(1) I can find no way of making it work with a filesystem on other than the first partition of the card, and

(2) It appears unable to read some small subset of files and directories on the filesystem, perhaps 10%. Thus, if your boot doesn't work, do an "ext2ls mmc 0 /uImage" (or whatever your filename is called), and if this shows up as a zero length file, try copying it into another file and using that to boot from instead. (If it works, it appears to consistently work.)

...Just FYI - I find the full sized SD card sticking out of the side of the box to be quite ugly and probably has quite a lot of potential to get dislodged.MMCmobile cards are about half length, and fit almost flush with the side, and seem to work just as well as my SDHC card. They only seem to come in sizes up to 2GB, but that ought to be adequate for an OS install.

Gothnet, I am not familiar with the MMCmobile format. Are the functionally compatible with SDCard (other than the half length) ? I have currently my ShPlug running off an external SDCard plugged into the side slot. If I use the MMCmobile, do I need a different sw driver, or it will work with my SDCard image?

Hey, sorry it took so long to reply, I haven't checked here (or used my plug) in a while. The problem with the MMC Mobile card was that the custom u-boot from kwonsk couldn't see it properly, like some of the other cards I have lying around. Once booted into an OS you could use it fine.

I think the drivers are the same and they are functionally compatible with SD, most devices that can use SD can use MMC, and MMCMobile is just half length MMC. My card even came with an extender to make it full length if needed.

Hey, sorry it took so long to reply, I haven't checked here (or used my plug) in a while. The problem with the MMC Mobile card was that the custom u-boot from kwonsk couldn't see it properly, like some of the other cards I have lying around. Once booted into an OS you could use it fine.

Not clear what you mean here. If booted from another place, can you then plug in your mmcmobile card and use it as a storage? Are you saying that you have not found a way to boot from it?

Do you have some urls to the brand/model of such a card, please? I do not think I have ever seen this form factor card... Thanks.

try to make a small first primary partition for boot. Like 500MB as ext2. The rest with the root filesystem can be ext3 or ext4. Having swap on a SD Card is not the best idea (even with builtin wear leveling)

try to make a small first primary partition for boot. Like 500MB as ext2. The rest with the root filesystem can be ext3 or ext4. Having swap on a SD Card is not the best idea (even with builtin wear leveling)

Thanks. I'll give it a try. I'm not sure what to do about the swap partition on a flash device, except to minimize the swappiness. Also what is the best filesystem? I read some sites that suggest the ext2 has less disk access.